Upgrade fonttools to 4.19.0 am: f8d82f7a26 am: 104832b19d

Original change: https://android-review.googlesource.com/c/platform/external/fonttools/+/1559685

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic7dd5d2b21f5f5358500a90025fab3fba1bc1f1e